#183754
Closest named color: Prussian Blue (#1D3557). oklch(32.8% 0.064 249), rgb(24, 55, 84).
Aa
White text reads best on this color (12.25:1).
About this color
#183754 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.064 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.010 away. White text reads best on it, at 12.25:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.25:1 |
Values
| HEX | #183754 |
| RGB | rgb(24, 55, 84) |
| HSL | hsl(209, 56%, 21%) |
| OKLCH | oklch(32.8% 0.064 249) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #183754 | 12.25:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #183754 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #183754 text on white | 12.25:1 | AAA | Lc 97.8 | Preferred for body text |
| #183754 text on black | 1.71:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEA
oklch(88.5% 0.026 248.1)
-
Step 300
300
#AAC4DF
oklch(81% 0.048 249.4)
-
Step 400
400
#7BA5CF
oklch(70.7% 0.077 249)
-
Step 500
500
#588EC2
oklch(63.1% 0.098 248.7)
-
Step 600
600
#3D77AE
oklch(55.5% 0.105 249.1)
-
Step 700
700
#2E6496
oklch(49.1% 0.099 249)
-
Step 800
800
#27527A
oklch(42.8% 0.082 248.8)
-
Step 900
900 (this color)
#183754
oklch(32.8% 0.064 249)
-
Step 950
950
#162839
oklch(27% 0.04 248.2)
#183754 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #2A3855 | 0.023 |
| Deuteranopia (no green cones) | #223253 | 0.018 |
| Tritanopia (no blue cones) | #003E41 | 0.050 |
| Achromatopsia (no color) | #353535 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183754
#183754
oklch(32.8% 0.064 249)
- #4A2E0A
#4A2E0A
oklch(32.8% 0.063 68.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #183754, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.010
- Dark Blue Grey #1F3B4D ΔE 0.022
- Midnight Green #073B4C ΔE 0.025
- Gunmetal #293241 ΔE 0.037
- Marine Blue #01386A ΔE 0.040
- Marine #042E60 ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.043
- Onyx #343A40 ΔE 0.053
Use #183754 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.